How to make a CUSTOM INVENTORY in ROBLOX!

Name: How to make a CUSTOM INVENTORY in ROBLOX!
Uploaded: 2025-05-01T01:28:35.000Z
Duration: 2 h 56 min 23 s

How to Create a Custom Inventory in Roblox

Introduction to Custom Inventory

The video introduces the process of creating a custom inventory in Roblox, encouraging viewers to watch until the end for complete understanding.

Viewers are directed to Patreon for files related to the project and access to an exclusive Discord channel for video ideas.

Setting Up Folders in Replicated Storage

A folder named "custom inventory" is created within replicated storage, followed by another folder called "settings."

Three string values are established: backpack folder name, hot bar folder name, and inventory folder name, ensuring correct naming conventions.

An integer value named num hot bar slots is created to define how many tools can be stored on the hot bar.

Keybind Configuration

A module script named backpack keybinds is introduced, containing a dictionary that maps slot numbers to input lists for equipping tools.

Another dictionary called keybind displays maps slot numbers to strings representing GUI text labels for hotkeys.

A second module script named hotspot keybinds is created with adjusted inputs for number keys 1 through 5.

Creating Inventory Folders

A new module script titled other keybinds is made with a dictionary mapping inputs used to open and close the backpack.

In server script service, a custom inventory folder is created again for organization purposes.

A function called create inventory folder is defined; it creates necessary folders and object values based on player needs.

Player Interaction and Tool Management

The function on player added responds when players join, invoking create inventory folder for their setup.

The system handles tool addition/removal events; it checks player's tools against those in their inventory folders.

Tool Management in Roblox: Functions and Logic

Initial Setup for Tool Management

Begin by checking the hot bar folder for free slots; if none are available, add a new value to the backpack folder.

Create a function called getTools that retrieves all tools from the player's backpack and checks which ones are equipped by looking inside the character.

Introduce a function named findValueFromTool, which searches through inventory folders to find matching values for tools.

Adding Tools to Inventory

Develop a function called addNewBackpackValue that appends a new object value at the end of the backpack folder based on existing values.

Implement findFreeHotBarSlot to identify the first available slot in the hot bar by iterating through each slot until an empty one is found.

Managing Backpack Values

Create shiftBackpackValuesDown, which moves every item in the backpack down by one position when an item is removed, effectively deleting it.

The function uses an iterator variable to check for existing values and deletes any empty slots after shifting items.

Updating Player's Tools

Establish updatePlayerTools, which updates both hot bar and backpack folders based on current player tools, removing any that are no longer present.

This function also attempts to find free slots in the hot bar or adds tools to the end of the backpack if no slots are available.

Resetting Tool Values Upon Respawn

A reset function clears all tool values upon character respawn since players may not retain their previous tools.

Introduce trackPlayerTools, which detects changes in tool inventory, calling another local update function as needed during gameplay events.

Event Handling for Tool Changes

Utilize character added events to clear old values and set up initial tool states whenever a player spawns.

Monitor child added/removed events within both backpacks and characters to manage unequipped tools effectively as they change throughout gameplay.

Preparing for Testing

Tool Management and Remote Events in Game Development

Updating Tool Values in Inventory

The fifth hot bar value is updated when a tool is dropped or picked up, affecting the inventory structure. When the first tool is dropped, its value becomes empty, and new values are created as more tools are added to the backpack.

Dropping tools from specific positions in the backpack causes all subsequent values to shift down, maintaining an organized inventory system. For example, dropping the sixth tool results in only 11 values remaining.

Creating Remote Events for Client Requests

A new folder named "remote events" is created within the custom inventory folder to manage client requests effectively. Clients can request actions such as dropping a tool, equipping a tool, unequipping a tool, swapping two slots' values, and moving existing values within their backpack. Each action requires a corresponding remote event to be created.

Implementing Unequip and Equip Functions

A function called unequipTool is developed to handle unequipping tools by checking if the player's character exists and then parenting the tool back to their backpack. This function must be bound to its respective remote event for proper functionality.

The equipTool function allows players to equip tools while ensuring that validation checks prevent cheating (e.g., equipping unauthorized tools). It verifies that the player has spawned before proceeding with equipping actions.

Handling Tool Drop Mechanics

The dropTool function manages how tools are dropped from a player's inventory by determining their position within either the backpack or hot bar folders and adjusting other values accordingly (e.g., shifting down values). It calculates where to drop based on player orientation using C frames for accurate placement in-game.

Validation of the tool parameter occurs before executing drop actions to ensure integrity within gameplay mechanics against potential exploits or errors during execution.

Swapping Slots Functionality

A swapSlots function enables players to swap two selected slots in their inventory while ensuring they do not attempt to swap identical slots (which would be invalid). This process involves temporary storage of one slot's value during swapping operations for seamless transitions between items.

Implementing Backpack Functionality in Game Development

Swapping Values Between Hot Bar and Backpack

A reference to the backpack folder is established, allowing for value manipulation between the hot bar and backpack.

An empty hot bar slot is created by dropping a tool, enabling testing of swapping with a backpack value.

When an empty value replaces a backpack value, the original backpack value is deleted, and remaining values shift down.

Moving Values to the End of the Backpack

A function named moveToEndOfBackpack is introduced, which takes a player and a specific value as parameters.

The function utilizes an existing method to add new values at the end of the backpack while setting the original slot's value to nil.

Validation checks are implemented to ensure that only slots containing values can be moved; if not valid, movement is prevented.

Server-Side Implementation Completion

Testing involves moving both hot bar and backpack values to the end of their respective folders.

The server-side functionality concludes with successful implementation of item movement within inventory systems.

Designing User Interface Elements

In the starter GUI, a folder named custom inventory is created along with necessary frames for organizing UI elements like hot bars and backpacks.

A frame called slots container is designed to hold actual slots within the hot bar container frame, ensuring proper sizing ratios for visual consistency.

Configuring Slot Layout and Interaction

A UI list layout is set up within slots container, facilitating automatic positioning of slots in horizontal alignment with specified sort order by name.

Buttons are added for opening/closing functionalities of both hot bar and backpack interfaces; aesthetic adjustments enhance user experience.

Finalizing Inventory Structure

The backpack scroller frame allows dynamic resizing based on content size; it uses grid layouts for organized slot display.

Button interactions are configured for closing actions on backpacks while maintaining consistent color themes across UI components.

Creating Slot Display Components

Individual slot buttons are designed to showcase tool information including texture IDs and key bindings through various text labels positioned strategically.

Duplicates of slot buttons are temporarily created for testing purposes before finalizing designs; organization into folders enhances project structure.

Hiding Default UI Elements

Backpack Functionality Implementation

Setting Up the Code

The code from the server script is copied, including necessary settings values. The local script will omit the drop tool distance.

Keybind module scripts are introduced, utilizing unpack to split returned items into two variables. This process is repeated for the backpack keybind module script.

GUI Components and Visibility Management

Essential GUI components are gathered, with the backpack container's visibility set to false initially to keep it hidden.

Backpack Open/Close Functions

A function named open backpack is created to set the backpack container's visibility to true.

A corresponding close backpack function sets visibility to false. A toggle backpack function checks current visibility and calls either open or close functions accordingly.

User Input Handling

Mouse button click events are used: clicking the close button triggers close backpack, while clicking the open button triggers toggle backpack.

The toggle function can now accept parameters from context action service, checking input state before proceeding.

Binding Actions and Testing

The bind action method of context action service is utilized, defining a unique action name and linking it to toggle backpack.

Inputs triggering this function are unpacked from another keybind module script for effective handling during gameplay testing.

Slot Button Management

Hiding and Showing Slot Buttons

A function hides a slot button when its associated value is empty by setting various UI elements' visibility to false.

Another function makes a slot button visible again based on whether an image exists in texture ID; if not, it hides related elements.

Setting Up Viewport Frames

A new function called setup viewport frame prepares a slot button with a tool by creating a model that contains tool parts while removing any problematic descendants like scripts or sounds.

Camera Positioning in Viewport Frame

To position the camera relative to the model, bounding box methods determine size and C frame. An invisible part serves as a pivot point for model manipulation.

Updating Slot Buttons with Tools

Creating Slot Buttons for Tools

Setting Up the Slot Button Functionality

A function is introduced to create a slot button, which will be visible if the tool has a texture ID; otherwise, it will set up using a viewport frame.

The function create_slot_button_name generates names for slot buttons based on their position in the folder, ensuring proper order by manipulating underscores.

To manage ordering, underscores are added before numbers: one underscore for two-digit numbers and more for three-digit numbers to ensure correct display order.

Determining Underscore Requirements

The number of underscores added depends on the digit count of the number; no underscores for single digits, one underscore for two digits, and so forth.

The function iterates through digit counts to append underscores accordingly and constructs the final button name.

Key Name Retrieval Process

Another function called get_key_name retrieves keybind information from dictionaries based on slot numbers to display appropriate hotkey labels.

It checks if inputs exist for a given slot; if they do, it extracts and formats the key name from its string representation.

Creating Actual Slot Buttons

The create_slot_button function initializes by obtaining the slot number and creating a copy of a template button with an updated name.

It sets up hotkey label text based on whether the slot value exists in either hotbar or backpack folders.

Managing Slot Button Visibility

If no keybind display is found, it hides the hotkey label. An update function is called upon changes or deletions of slot values to maintain accurate visibility.

A new function is created to generate all hotbar slot buttons by iterating over values in the hotbar folder and parenting them appropriately.

Testing Tool Visibility in Hotbar

Observing Tool Behavior in Hotbar

Upon testing, tools appear correctly in designated slots when picked up; dropping them hides their respective slots as expected.

Adjusting Viewport Settings

Issues arise with displaying certain tools (like flashlights); adjustments are made to viewport settings including distance and angle for better visibility.

Implementing Backpack Slot Management

Creating Backpack Slot Buttons

A similar approach is taken to create backpack slot buttons by iterating through values in the backpack folder and checking existing buttons before creating new ones.

Handling Dynamic Changes

Creating Slot Button Functions

Setting Up Slot Button Appearance

A function named set_slot_button_equipped is created to change the appearance of a slot button, indicating that the tool isn't equipped by setting its background color to gray.

Another function, also called set_slot_button_equipped, changes the button's appearance to show that the tool is equipped, setting its background color to white.

Managing Equipped and Unequipped States

The set_unequipped function checks if there is an equipped slot button. If one exists, it calls set_slot_button_unequipped on it and resets currently equipped variables to nil.

The set_equipped function takes a slot value and equips the corresponding slot button after calling set_unequipped to ensure no other tools are equipped.

Equipping and Unequipping Tools

The equip_unequipped_tool function determines whether to equip or unequip a tool based on its current state. It fires an event for unequipping if it's already equipped.

If a slot has no value, equipping should not occur; otherwise, it sets the equipped state and fires an event for equipping.

Handling Tool Slots in GUI

Creating Slot Buttons

When creating a slot button in the GUI, call set_slot_button_unequipped since initially no tool is equipped.

A new function finds a slot value from a tool by iterating over hot bar values first and then backpack values if necessary.

Updating Equipped Tool State

The update_equipped_tool function ensures that the UI reflects any changes in equipment status by checking for tool objects within the character.

This includes binding functions to both child added and removed events so that when tools are picked up or dropped, their states update correctly.

Implementing Keybind Functionality

Binding Key Inputs

A new function called bind_keybinds receives keybind dictionaries along with inventory folders and prefixes for action names.

Each iteration checks if a corresponding value exists in inventory; if not found or empty, it triggers an unequip event.

Testing Keybindings

Action names must be unique between hot bar and backpack key binds; otherwise, they will override each other during testing.

Drag-and-Drop Functionality for Slot Buttons

Implementing Dragging Mechanics

A new screen GUI named "dragging GUI" is created within starter GUI's folder to manage dragging actions visually.

Dragging GUI Elements in Game Development

Setting Up Dragging Mechanics

The process begins with updating the position of fake buttons and creating necessary variables to track elements involved in dragging, including the original button and its fake counterpart.

A threshold of 5 pixels is established, requiring players to move their mouse by this amount before initiating a drag. The function listens for the mouse button down event to start dragging.

If the slot value is empty, dragging is aborted. Variables for the original button and initial mouse position are updated at this stage.

Implementing Dragging Logic

A while loop iterates every frame, checking for changes in mouse position and ensuring that dragging hasn't been canceled if the player releases the mouse button.

Once movement exceeds the threshold, a fake button (a clone of the original) is created. The hotkey label on this fake button is hidden to maintain clarity during gameplay.

Adjusting Button Size and Position

To ensure consistency across different resolutions, calculations are made based on screen size and absolute sizes of buttons. A local function updates these sizes accordingly.

Functions are defined to update both size and position based on current mouse coordinates converted into scale.

Finalizing Dragging Functionality

The original button's appearance is set to unequipped while placing the fake button within the dragging GUI context.

Upon releasing the mouse button, a function resets all dragging values back to nil. This includes checks for whether any fake buttons have been deleted.

Handling Drop Events

Functions are created to determine if the mouse pointer is inside specific GUI elements when dropping occurs. This involves calculating minimum and maximum positions relative to those elements.

Additional functions identify which hot bar slot or backpack item corresponds with where the mouse hovers over during drop actions.

Slot Management Functions

A function retrieves details about slots under cursor control without needing individual checks for each slot; it focuses primarily on x-axis positioning.

Another function iterates through backpack items to find associated slot buttons using previous checks for cursor positioning.

Swapping Slots Logic

A new function called shift equipped slot manages shifting slots down when conditions regarding empty slots in backpacks are met.

Tool Management in Backpack

Managing Slots in the Backpack

A function is introduced to check if the first slot is occupied and the second is empty; if true, it deletes the first slot by calling shift equipped slot.

The move to end of backpack function requires the number of slots and updates equipped slots based on whether a tool is parented to the character.

If a tool isn't equipped but another one is, it triggers shift equipped slots, ensuring proper management of tools within slots.

Handling User Input for Dragging Tools

The script listens for mouse button release events to stop dragging; checks if any item is currently being dragged before proceeding.

It calculates mouse position relative to UI elements, ensuring actions only occur when items are dragged over visible inventory frames.

Slot Swapping Logic

When dragging an item over itself, it resets visibility; otherwise, it swaps two different slots using swap slots.

If no valid slot is found during dragging, it moves the item to the end of the backpack or hot bar as appropriate.

Final Adjustments and Testing

The system checks for mouse position within hot bar frames and handles swapping accordingly; if outside any inventory UI, it drops the tool.

A typo was identified that affected functionality when swapping with an equipped slot. Adjustments were made to ensure correct behavior when dragging items.

Conclusion and Call to Action